Archive for the ‘life’ category

How Things Work

January 3rd, 2010

flying

As a part of my employment, I occasionally have the opportunity to talk to students in the local schools about my work.  I tend to treat these talks as a “choose-your-own-adventure” for the students, weaving some of my stories and demonstrations into the discourse along the way.  The students love it because they are participating; the host teacher and I don’t get bored hearing/saying the same thing over and over.  It’s a win-win for everybody.  Plus, I get to explore the creativity, imagination, and mental models of the students.  This is one of those stories.

About a month ago, I was talking to some 8th graders about electromagnetic radiation and radio.  When we were talking about the speed of light, I asked the class if anybody knew how GPS works.  One student raised his hand and I called on him.

“You type in the address of your destination.  Then, a satellite moves over that spot and it directs you in.”

These answers always surprise me.  “If there was a satellite for every GPS user, ” I asked, “how many GPS satellites do you suppose that there are?”  He speculated that there had to be quite a few.  Then, I asked, “How much do you suppose a satellite costs?  Do you think that would be cost-effective?”  The discussion continued for a minute or two until we converged on the time-of-arrival method.

Later, I was reminded of watching the movie Enemy of the State with my dissertation advisor when we were on a field installation trip.  We chuckled when a spy satellite was repositioned to track Will Smith’s character.  It’s a good movie, but it’s a bit fanciful at times.  The movies might be the most education the average person gets about satellites—a sobering thought.  On the other hand, there are dozens of things (such as biology, I tell my wife, who did her B.S. in biology) that I treat like black boxes.  There’s just too much to know about to have specialist understanding of it all.  How much is enough?

Since today is Epiphany Sunday (the day that celebrates the magi visiting the baby Jesus) in most Christian churches, I also add the following:  A week ago when we were home for Christmas, I was telling Dad how I always enjoy questioning students about how technologies they take for granted operate to cultivate their creativity and curiosity.  I mentioned the model of the GPS satellites hovering over destinations.  He quickly replied, “Well, that’s how the wise men found Jesus with the star, isn’t it?” These people keep me on my toes!

Cool, Clear Water

October 10th, 2009
Sligo Creek

Sligo Creek

The long exposure shot of running water is a cliché.  But, we were out for a walk on an unseasonably pleasant evening this week and I had to do it.  It’s hard to believe that this is less than a mile from our house.

Homebrew Fire Ring

October 3rd, 2009
Homebrew Fire Ring

Homebrew Fire Ring

At our last place in Urbana, we had our “space” in the back yard, sort of an outdoor living room.  The new house lacked that until recently.  We obtained a rusty old truck tire rim from some of my not-too-distant kin in the tire business.  I picked-up a rust-buster abrasive head for my angle grinder and went to work on the rust and caked-on road/tire grime.   Some degreaser and a rag helped get most of the rest of the grime out.  Then, I painted it with flat black grill paint for a classy rust-free look.

Total cost: about $10 plus three hours’ time to finish the rim.  The neighbors probably think we’re rednecks.  But, who cares?  We had the first of hopefully many pleasant fires tonight.  Besides, how many chimenea owners had the pleasure of busting rust off of a 35-pound hunk of steel?

Interesting trivia:  In the past three posts (inclusive) with photographs, the on-going projects are pictured.  That is, in the workbench photo, the antenna mast and rotor control box are shown in the lower left portion of the image.  In the rotor photo, the unfinished fire ring is under the rotor.  Then, this post has the finished fire ring. The beat goes on…

sakhalin turns 10

July 25th, 2009
Sakhalin

Sakhalin

We moved recently, hence the lack of posting to the site (the pending completion of my degree and preparations for employment have contributed to that, as well).  Among the moving dust, I discovered the invoice for the desktop computer that I bought when I started college.  It was dated 7/20/1999, ten years ago this past Monday.  The price was $2,283.29.

What did that princely sum include?

  • 17-inch CRT monitor
  • Pentium-III 500 MHz CPU (1)
  • Dual-CPU capable motherboard
  • 256 MB of PC100 SDRAM
  • Western Digital 20.4-gB hard drive
  • ATI Rage Xpert 128 16 MB video card
  • Adaptec 2940U2W Ultra-Wide SCSI card
  • Iomega Zip drive
  • SCSI CD-ROM
  • 3Com 3C900 Ethernet card
  • Microsoft Windows NT 4.0
  • Microsoft Office 2000 Small Business

If I was going to spend that much again, I would have done it slightly differently, ditching the expensive SCSI hardware that I never ended up exploiting and buying the second CPU right away.  But, this was a great machine—I was probably the first student with 256 MB of RAM, certainly no one else on my dorm floor had it.

Windows NT never quite worked right with everything.  But, then again, neither did Linux.  The ATI Rage Xpert 128 was not supported in X for at least six months after I bought the system.  Linux was less of a pain than Windows and so, I operated from the console for my first two quarters of undergrad.  People often ask how I learned Linux.  You learn fast when you have no option but the command line.

This computer was the beginning of a tradition: naming computers after islands.  I named it ‘sakhalin.’  I asked for a static IP address and received the DNS entry sakhalin.onu.edu (which at the time pointed to 140.228.23.4).  This was the first of many islands:  mauritius.onu.edu (the Radio Free Maglott/Radio Free Roberts server), roatan.onu.edu (a 486 that I ran FreeBSD on for kicks), curacao.onu.edu (another 486 that ran Linux), palau.onu.edu (the special projects machine), tahiti.onu.edu (my iBook).  Those machines have all since past.  Although, I still have crete (my secondary web server), vieques (my MacBook), formosa (home Linux machine), and of course, sakhalin.

Over the years, I upgraded sakhalin to two Pentium-III 500 MHz CPUs.  (I actually bought the CPU via an eBay auction using Lynx—a fun piece of trivia.) The power supply needed an upgrade at this time, too.  I also added 512 MB of RAM and a SCSI CD-RW drive.  The Ethernet card is now an Intel EEPro 100Mbit/s card and the video card is an ATI Radeon with 64 MB of RAM.  I replaced the monitor with a 19-inch Dell Trinitron, which is beautiful.

And then, there is software.  sakhalin has run every GNU/Linux major kernel version since 2.0.36: 2.0.x, 2.2.x, 2.4.x, and 2.6.x.  It has run at least four different distributions:  RedHat, SuSE, Gentoo, and Xubuntu.  It has also run Windows NT 4.0, Windows 2000, and it is currently running Windows XP.

sakhalin has been a good and reliable performer, although I get the occasional unknown error message.  It has recently moved to replace the Pentium 166 that I had been using to manage my contest station.  I’m looking forward to many more years of faithful service…

» Read more: sakhalin turns 10

Reading other peoples’ poetry

May 17th, 2009
Mobile Carwash, San Juan, PR

Mobile Carwash, San Juan, PR

This entry is dedicated to my brother Seth, who recently bemoaned his declining creativity.

Seth makes a lot of interesting points about things that may or may not have affected his creativity—resource-poor, idea-rich; lack of peer pressure (this one is brilliant, by the way); risk-averse grown-up life; personal disorganization; time-poor; adverse affects of education; etc…

I would like to counter that none of these things necessarily impede thinking creatively, although they might impede acting on that thinking to various degrees. At some earlier point in my life, an English teacher proposed that in order to be a good poet, you had to read other peoples’ poetry. I scoffed at the idea at the time. After all, poets disregarded normal rules of communication. What did it matter that you read anyone else’s work?

It turns out that it matters a great deal. Poetry forces you think about things in a different way. For me, the idea of poetry is fascinating: a “word bargain,” as another teacher once described it. But, have you ever read poetry? It’s like medicine: it might be good for you but they can’t hide the true flavor. I digress. The good news for scientists, engineers, designers, tinkerers, and people who just don’t read, is that we are surrounded by wonderful poetry written on everything we see and do. We must merely notice it and read it.

Carry a notebook, carry a camera, look with a critical and curious eye…

Are you reading other peoples’ poetry?

About the photograph: A mobile carwash system at Parque Barbosa in subbarrio Ocean Park, barrio Santurce, San Juan, PR. The red van contains a large polyethylene water tank and a pump. What problems does this solve? Create? Note locally-available materials. Definitely OPP.

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Resume of a Master Dumpster Diver: the Early Years

February 21st, 2009
Dumpster

Dumpster

With transition imminent in our lives, I have begun packing up some of my things that I don’t use much right now. It’ll save some time and headaches when we finally figure out where we’re going and begin the moving process. Coincidentally, my good friend Matt recently moved cross-country and elected to dispatch the majority of his tinkering resources via Craigslist. You see, Matt and I share a common vice: we are master dumpster divers.

I was reminded of this reality as I have been trying to center myself with respect to what’s important in life last week week. I have a lot of stuff, frankly, an embarassing amount of stuff. And, although I use a surprising amount of it, I really don’t need it. But, this post is about collecting the stuff, not getting rid of it. I’ll save that for a later post.

As I began sifting through some of the goodies tonight, a confluence of thoughts began to swirl in my head. I’ve had resumes and vitae on my mind for quite a few months now since I’ve been looking for employment (if you hire engineers or scientists, particularly for RF/signal processing/remote sensing/upper atmospheric/space research and development, I’m your man). And, I was poking through the rubble of my home “office,” which is actually my office, hamshack, and workshop, plus Sarah’s desk and books and the place that Sarah and I cram stuff into when company comes. Suddenly, it hit me: my entire resume can be read through my collection of odds and ends.

Dumpster diving, to borrow the analogy from Nelson Muntz, is like “kicking butt” in the sense that it might not involve any kicking at all. Likewise, you have to get to the stuff before it gets to the dumpster. This is the first rule of dumpster diving: Know who to ask, how to ask, and when to ask. The second rule is don’t get greedy. I learned both of these rules at a tender young age.

You see, the house I lived in between the ages of three and nine was next to the Village of Millersburg’s street department garage. Of course, this was a great boon for a child of my age to see all of the equipment and workers coming and going. Mom and Dad may remember this story differently; but, this is my recollection.

Although I was fascinated by all aspects of construction work, the one thing that I obsessed over more than anything else was signage. Some kids are experts on dinosaurs, I was fascinated by road signs. I coveted the road sign poster on the wall at the BMV. Mom had inquired about obtaining one for me to no avail. The other thing I coveted was a road sign or two of my own. A friend had a stop sign in his room; but, I was looking for something more exotic, maybe a yield sign. My poor mother worked some connection she had at the Street Department to get a discarded sign. She told me that we could go down to the sign depot and pick one out in the morning, which was probably a mistake.

I rose particularly early the next morning and, after locating the sign depot, collected a few signs for myself. When you’re a kid, street signs don’t look big and heavy on their posts. But, when you get up close, they rival your personal geometry. So, I left a trail of signs I couldn’t carry back up to the house. I don’t remember the details of what happened next, other than that we had to return all of the signs and get “approved” ones. I hope somebody thought it was funny; goodness knows I learned a lesson that day about the difference between dumpster diving and theft of city property.

A few years later, Mom had an antique dealer come through the barn behind the house and the signs caught his eye. She let him have them for a song. I was incensed at the time, although in retrospect, it was probably better to not profit too much on them.

The basement of the Inventor’s Hall of Fame once hosted an area where kids could dismantle old hardware. We were fortunate to visit when some racks of AT&T Long Lines hardware had been recently donated. I think I carried a half-dozen plastic sacks of relays, waveguide, transistors, meters, and other assemblies out of there that day. Although I have sifted through most of that by now, the juiciest pieces still remain in my inventory, ready for use. I still don’t think that the docents knew what hit them when the budding master dumpster diver rolled in.

Although I dabbled off and on in the barter of used electronics and such in high school, the dumpster diving began in earnest again in college, where I met guys who weren’t afraid to actually climb into real dumpsters to fish things out. Those were good times. Most of the stuff we pulled out of the dumpsters was building materials, which we used to spruce up our living spaces. Blocks from a demolished (the Young Building of Philosophy and Relgion, a grievous sin against architecture and HVAC) academic building allowed us to put an “upper deck” couch behind the regular couch in our apartment for stadium seating. This was great for watching movies, or at least watching my roommates play Mario Kart 64 with their pharmacy notes on their laps…right.

One of the other great successes was DuddiNet and the Tower of Power. I dragged an 8-foot relay rack (rescued from the scrap heap at a summer job) into my dorm room and filled it full of computers and networking equipment. I asked the university IT people if they had any leftover rolls of CAT5 cable and they gave me as much as I wanted. We pulled our own network in the dorm. At that time, the dorms were 10baseT with hubs. So, it was a real bottleneck if you wanted to move some data (use your imagination here) around. We put in a private switched 100baseT network that connected four rooms on two floors.

In more recent years, I’ve scored some terrific stuff just by paying attention when spaces are being cleaned-up. For instance, that’s how I got my HP vector voltmeter and my oscilloscope. And, indirectly, through Dad, it’s how I got some more Greenlee punches and a set of metal-marking stamps. Anyhow, in order to protect “sources and methods,” I’ll decline from disclosing too many details about my more recent activities…I haven’t swiped anything from a forbidden dumpster, though. Promise.

» Read more: Resume of a Master Dumpster Diver: the Early Years

Outliers

January 18th, 2009
Outliers

Outliers

The astute follower of my blog (Does such a person exist?) has no doubt discovered that I recently finished reading Malcolm Gladwell’s book “Outliers.” I was quite keen to read it after having read “The Tipping Point” and “Blink” previously. Although it was released in November, Sarah and I finally got our hands on a copy during a recent trip to the library.

Gladwell is a good storyteller and, like the two before, this book is quite compelling. But, for the first time, I was left wondering, “Has anyone written a critical rebuttal to any of his books?” Maybe I’m resisting some of the stereotypes he makes. Perhaps the greatest one is the young man brushed aside by his professors. I was indignant that a university, or in this case, two universities, would casually let someone apparently so bright, fall between the cracks for such trivialities as re-arranging a course schedule. I suppose this has to do with building prior rapport with the faculty, which is related to Gladwell’s point that middle- and upper-class children are frequently brought up to engage authorities to shape their relationships. But, I digress.

The other point that I hope is not lost in the talk of lucky breaks and heritage is the idea that success comes from hard work. Opportunities seized produce success.

When I worked in the cleanroom at Minnesota, I remember one of the other members of my research group telling about the dogged determination of some of the other students. They would produce failure after failure until they got something working. This sort of Edisonian tenacity is highly-prized in Asian cultures. In fact, when I was interviewing with some potential faculty advisors at Illinois, Milton Feng told me, “Ah, you are a country boy. I like farm kids. They work hard.”

How do we structure our learning environments to make hard work a joy? Math, science, and engineering are learned, much like everything else as Gladwell argues, by putting your time in. Certainly, there are some things like birthday cut-offs and population trends, that we have less control over. But, we can make ourselves and our students more successful by making the journey more rewarding and interactive while retaining the rigor that invites exploration and hard work. Can we reach out to talented students whose background differs from the “successful norm”?

The verdict: it’s a thought-provoking book interwoven with enough subtly obvious ideas to help you feel good about your understanding and what he’s saying. I would love to see an equally well-written rebuttal, though.

» Read more: Outliers

Landmarks

January 1st, 2009
MAP Refinery

MAP Refinery

Our holiday travel schedule took us past the Marathon Ashland Petroleum refinery in Canton, Ohio.  It has been a landmark on our trips to visit Mom’s family.  I wouldn’t have bothered to photograph it except Dad took one on the way up.  Since it was taken just before dusk on a cool, damp, winter day, it seems even more industrial.  The flame near the center of the image burns almost perpetually.  As a child, I always wondered why they just burned it off.  It seemed as if it were burning, somebody could at least use it to fuel something, even if it was waste.

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Christmas Cookies

December 31st, 2008
Grandmas Christmas Cookies

Grandma's Christmas Cookies

These are two of my favorite cookies:  thumbprints (foreground) and iced sugar cookies.  Grandma made them both this year.  I commented to Dad (or Mom, I forget who now) on the relative paucity of thumbprints on the platter.  True to form, Grandma had sent some home with earlier visitors because “something was wrong with them.”  What was wrong, I’ll never know…they tasted good to me!

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Hobby, Passion, Obsession?

December 13th, 2008
Bus Stop

Bus Stop

When does a hobby become a passion?  When does a passion become and obsession?  I missed the bus the other day taking long-exposure shots at the bus stop (none of which came out good enough for the web—need a tripod).  I sprinted two blocks and caught the bus at a stop light.

» Read more: Hobby, Passion, Obsession?